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Effect of green manure and different amounts of nitrogen and phosphorus fertilizers on wheat grain yield in Dezfoul environmental conditions
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A. Modhej *   , A. Mohamadpour |
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Abstract: (4956 Views) |
| In order to investigate the effect of green gram sowing date as a green manure and different levels of nitrogen and phosphorous fertilizers on wheat grain yield of Chamran cultivar this experiment was conducted as split-plot factorial experiment based on completely randomized blocks design with three replications in 2008-2009 cropping year. Two green gram sowing dates 3 July and 10 August plus fallow plot were considered as main plot. Three levels of nitrogen fertilizer (without fertilizer, 60 and 120 kg net nitrogen per hectare) as the first factor and three levels of phosphorous fertilizer(without fertilizer, 45 and 90 kg net phosphorous per hectare) as the second factor were in sub-plots. Results indicated that the effect of green manure and the interaction of experimental treatments on grain yield at five percentage probability level and the effect of nitrogen and phosphorous treatments on this trait at one percentage probability level was significant. Sowing green gram manure in dates 3 July and 10 Aug increased grain yield by the amount of 15.3 and 3.1 percentage as compared with fallow treatment. Delaying in green gram sowing date reduced the useful effects of the green manure in grain yield. The highest grain yield was belonged to the treatment combination 120 kg nitrogen +90 kg phosphorous at green gram sowing date on 3 July. Generally, the results of this research showed that sowing green gram as a green manure on date 3 July increased wheat grain yield as compared with fallow conditions. Also, it is clear that when using green gram as green manure, grain yield in fertilizer treatments 60 kg nitrogen and 45 kg phosphorous per hectare was higher than treatment 120 kg nitrogen + 90 kg phosphorous per hectare in fallow conditions. Increasing the grain yield in green manure treatments as compared with fallow treatment was due to increasing grain number per unit area and biological yield |
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| Keywords: Green manure, Inorganic fertilizers, Wheat. |
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Full-Text [PDF 249 kb]
(3879 Downloads)
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Type of Study: Research |
Subject:
Crop Physiology
Received: 2014/05/26 | Accepted: 2014/05/26 | Published: 2014/05/26
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